thebugger

modified 8 years ago

Class H Amp simple example

305

03:22:35

This example lacks certain features to make it work reliably l, but it shows basically how a class H amp should behave. The supply rail is being modulated by the same signal that appears on the output, and follows the curvatures of the wave, just a few volts above it. This way if the output stage is in class A amp, the average power consumption will always be the same, and the efficiency wouldn't worsen with lower output levels. You still benefit from the increased linearity of the amp, but also benefit from increased efficiency, if the supply rail modulator is made from a more efficient class of amplifier (Class B or maybe even D, although I haven't encountered such a revision of this type of amps). 

published 8 years ago

hurz

8 years ago

Constant 3V+4V=7V and constant 10mA makes constant 70mW power dissipation. Were is the class H feature? And try to be NOT a foul mouth like normal if you get into the fraud-trap again and again. 😘

thebugger

8 years ago

Typically these amps come with a split rail power supply in order to swing symmetrically both ways. I just wanted to show one leg of the circuit, and how the power rail swings on top of the output by a few volts. I think I've made an example somewhere, but I can't seem to find it.

hurz

8 years ago

Buggzy, just shut up!

thebugger

8 years ago

You shut up u cunt :D

hurz

8 years ago

Conclusion: your circuit is pointless.

thebugger

8 years ago

Conclusion, your comment is irrelevant :)

jason9

8 years ago

Check out my remake of this circuit.

jason9

8 years ago

Does my simplified version look like it'll have the efficiency of a class-H amp, or just a regular class-A amp?

thebugger

8 years ago

No, that's full on class A mode. Class H mode varies the supply rails a few volts above the output voltage with the same signal as the output.

jason9

8 years ago

Well, your circuit is exactly the same in function and efficiency. I just simplified it for you.

jason9

8 years ago

Take another look at my circuit, and make sure to read the description. I updated it.

jason9

8 years ago

Also, if you don't see a change (it's really obvious), just hit the rightmost button at the top-right. It checks to see if there are any changes like new comments and updated circuits.

jason9

8 years ago

Ok, I just added a couple more amps for a total of four, and made them go from most like your circuit to least like your circuit, so that you can see how I got from your circuit to my simplest version of your circuit. This way, it'll be easy to see that your circuit is just a uselessly more complex version of my simplest remake of your circuit.

hurz

8 years ago

Right Jason! Thats exactly what buggzy's circuit is, pointless. The only stubborn who do not want to see that is Mr I-know-everything-with-5-years-experience Buggzy. Normaly, he has in this situtation 3 strategies. 1. Just say nothing and wait till the circuit is loost. 2. Delete its conntent without any related futher comment and put something completly new inside the schematics. Or 3. Just remove it from public. But in all 3 cases he first gets extremly rude and a foul mouth. Lets see why Mr Bugger does not understand its own "simple example" which seems to be to conplicated for him.

hurz

8 years ago

Buggzy, one word for you. Jason took quite a lot effort to understand your circuit which you stated as "simple example" and you gave a shit to help him over days. How arrogant is this? Jason seems to be a clever boy, and you teach him thing youself do not understand. Idiot.

hurz

8 years ago

Buggzy turned from a foulmouth into a quiet mouth. Thats fine.

add comment in editor